Fix bug in gpu feature extractor
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#	modified:   CHANGELOG
#	modified:   README.md
#	modified:   bin/linux_64/cuda/libTH.a
#	modified:   bin/linux_64/cuda/libTHC.a
#	modified:   bin/linux_64/cuda/liboverfeat_cuda.a
#	modified:   bin/linux_64/cuda/overfeatcmd_cuda
#	modified:   bin/linux_64/cuda/webcamcmd_cuda
#	modified:   bin/linux_64/libTH.a
#	modified:   bin/linux_64/liboverfeat.a
#	modified:   bin/linux_64/overfeatcmd
#	modified:   bin/linux_64/webcamcmd
#
